If i had a five channel amp 4 channels at 4 ohms to 4 speekers 75w each and one sub channel is 300w at 4ohms but i have two subs that are 4 ohms each and requre a little bit more power, about 200 each should i get another amp or is it ok to just hook both subs to the one channel. . . and just make due with the slight power loss? or will i just increase that one channel now to 8ohms? my goal is i wanna run all four mids and both subs with one amp. . . but i cant find an amp with two sub outs. . .
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Re: is it a good idea
Based on your description and on the idea of a single amp, then your plan of hooking up both the subwoofers in series (to get 8 ohms) would be the safest as against running the subs in parallel (2 ohms). This way the sub amp would not be overly loaded, you can compensate the slight loss in power by strategically positioning the 2 subs. A friendly reminder, pls observe polarity when hooking the sub speakers.
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.
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Is the amp a single channel? If so, the only way to connect the subs (without overloading the 2 ohm stable amp) is to wire each sub's voice coils in parallel (2 ohm) and then connecting the subs in series (4 ohms). If the amp is two channel, the subs can have their voice coils connected in parallel (as before) and then each sub connected to its own channel.
First, you need to know whether you have the 2 ohm DVC subs or 4 ohm DVC subs. Second, you need to know the minimum impedance the amp can handle (most are 2 ohm, some are less). Putting two voice coils in parallel will cut the total impedance in half (e.g. 2x 4 ohm voice coils in parallel = 2 ohms total). Putting subs in parallel will also cut the impedance in half.
At one end of the spectrum, you could put the 2 ohms DVCs in parallel, then parallel the two subs, and bridge the 2 channels of the amp. That would put 0.5 ohms impedance on the 1 bridge amp channel. If the amp can do 0.5 ohms x 1ch, do it. Otherwise, you may have to run the subs on separate channels.
Depending on the PA FUBAR you have. The voice coil on those subs are DVC. Dual Voice Coil. You need to know a couple things. What kind of amp are you going to run on it. And what is the resistance (OHM) rating of each voice coil. MY two 12's are dual 4 ohm. Meaning that there are essentially 4 speakers to hook up. My amp currently is not 2 ohm stable in bridged. So what I did is run each speaker in parallel (red2red,black2black) then run to the box terminal. So now the dual 4 ohm voice coils are basically 2 ohm. I have 2 speakers. Now I hook the box up in series. To bring the now two 2 ohm speakers into one 4 ohm speaker. This is called series/parallel setup. My amp sees this box as 1 channel @ 4ohms. The downfall to this is the output of the amp is divided up into each speaker. So instead of sending all 1400 watts to one sub. I will send 700 to each sub. But here is a catch. even though each speaker is half the total wattage it will still be 3db louder. Meaning it will be as loud as 1 sub running 1400 watts. To conclude i need to know how many of those subs you are going to run on the amp.. And the model number of the amp so I can match up your wiring.
Buy a quality 2 channel amp. About 600 rms and set one channel as your highs using your crossover and then the second channel on "low" position for your sub. wire directly in to your low's channel with your sub at 2 ohms and then wire your speakers to the other channel.
You cant bridge it to the MONO AMP . You can only bridge subs & speakers to 2 CH & 4 CH AMPS that are bridgeable. Because if it appears that there is 2 channels on a Mono amp its so its convenient for you to hook up 2 4ohm subs to it easily But both channels are actually connect internally together in parallel inside the amp unlike a 2 channel they are separate.
So just connect your mtx 9500 to a plus and a minus and doesnt matter which since all the + terminals of are connected together and - are connected together already.
Whats important is on the side of the sub/box it reads 2 ohms. The lower the ohms the more power the Mono amp will put out. Mono amps are designed to handle 2ohm loads.
If it reads 4ohms The MONO amp is the wrong amp to use cause the power will be weaker. So if you have a 1000 Watt Mono amp at 4ohms the sub will only get 500 WATTS Max while a 2 ohm will get the full 1000 Watts.
If it reads 4 ohms connect it to a 2CHANNEL AMP and BRIDGE IT (connect + of the sub to 1st channels positive of the amp then connect - of the sub to 2nd channels negative of the amp) . The power will be doubled when you bridge it on a 2 channel amp. NOW if it was a 2 ohm sub and you bridged it to the 2 channel amp it will fry the subs and ruin the amp. 2 CHANNELS CANT TAKE A 2OHM LOAD BRIDGED OK.
if the amp has a 2 outputs then i would wire the two 4ohms together, and the 2ohm by itself. and if its a 4 channel output then wire them all sepretly, if its a 1 channel output then wire the two 4ohms together and leave the 2ohm sub out
I believe these are 4ohms, if so buy a 2ohm stable monoblock amp, that puts out 250-300 watts RMS, and connect your subs to it in parallel, don't pay attention to peak watts, look at RMS watts, or continuous watts. If they're 2 ohms, buy a 2 ohm stable 2 channel amp that puts out 125-150 watts RMS per channel, and 250-300 watts total or bridged RMS output. And connect them normally, on sub per channel... hope this helps, as far as brand recommendations, MTX, pioneer, Alpine, Kenwood... Good luck
First for finding the amp I would go to Ebay, there are a lot to choose from there. A one channel amp would be the best being that it is made to drive subs. If each sub is 4ohms and you wire them in parallel (positive to positive-negative to negitive) you'll get a 2ohm mono load. So the amp you buy should be rated at about 600 watts RMS @ 2ohms to match the subs. You can however go with an amp that has a lower or higher rating and be fine. Just try to get one that is close to what you need. My recommendation would be a JL Audio 500/1 sub amp. (Ebay has some on sale now) The amp has a feature called ohm matching making it very easy to use with almost any setup. It also has subsonic filters and many other features so check it out.
175W x 2 @ 2 ohms
350W x 1 @ 4 ohm
Your amplifier is not stable @ 2 ohm bridged. So you will have to wire them independantly on each channel.
+/- on sub to +/- on L channel
+/- on sub to +/- on R channel
Wiring the subwoofers in paallel will result in a 2 ohm load, which your amplifier is not rated to do. Doing so will cause heat buildup, and damage to the amplifier.